Air tension-motor.



mama:

No. 835,774. PATENTED NOV. 13, 1906. G. P. BRAND.

AIR TENSION MOTOR.

APPLIGATION FILED JAN, 1904' 4 SHEETS-SHEET 1.

l E I 74 "1 i $2 .2

0 0 0 O O 0' Q 0 0 0 6 0 0 6 0 PATENTED NOV. 13, 1906.

G. P. BRAND.

AIR TENSION MOTOR.

APPLICATION FILED JAN.15, 1904.

4 SHEETS-SHEET 2.

WW \mws.

PATENTED. NOV. 13, 1906.

G. P, BRAND.

AIR TENSION MOTOR.

APPLICATION FILED JAN.15, 1904.

4 SHEETS-SHEET 3.

. 22 Hwwssws.

9. AMA.

PATENTBD NOV. 18, 1906.

P. BRAND.

' AIR TENSION MOTOR.

APPLICATION FILED JAN.15. 10044 4 SHEETS-SHEET 4 WWW:

m\n%swsf W J'AQQZ I UNITED STATES GEORGE P.

sumo, or urn YORK, r:

mu "rsusiom sucros.

No. easy-rs.

Specification of Letters Patent.

Eupljcation filed January 15, 1904. Serial h cv 189.101.

Air T01lSlOll-hlOilOl'S. of which the iolloviin is a s' 'wciiicationsufi'icieut to enuhle others skilled in the art to which the invc tioncppertnins to make and use the some.

My invention relstcs to pneumatic motors actuated prionirily by theWithdrawal of oil tl'icrelrom by reason of their connection i lirectlythrough the medium of vslvecontrolled ports with tension or exhaustmechanism, and is applicable to the feeding of music-sheets to otrcckenboerd cud analogous uses in which a light compact easy-runningmotor is it desiderotum.

Hence the main object of my invention is to economize space and at thesome time simplify and chesfpen the construction of the motor as awhole.

The distinguishing feature of my invention consists in providing eachpneumatic forming at component port of the motor with a solid port-plateand with valves controlling said ports arranged to travel on oppositesides of sold solid port-plate; those controlling the outlet or tensionports being orronged Within the PUQLHH&ClCS,'Wl1ll-B those controllingthe inlet or airports are situated externally thereto; but while theoutlet valves are thus situated Within the pneuspecifically.

p12: te, thepneumctics being removed motics when the latter are securedin place upon the ort-plzi-tc they are entirely independent of the saidpncumatics in so for as support is concerned, both sets of valves beingmounted. directly upon said port-plcic and the inner orstc tionary sideof ecclipneu motic consisting simply of a frame 'which is dctcchublysecured to the port-plate, the pneumctics being thus nmdc detachable soto give access to the disclni-rge-Valvcs for the purpose of adjustment,&c-.

My invention also includes certain other features in the constructionand arrangementof ports hcreirmfter described and claimed in theaccompanying drawings, Figure 1 is a front View of my improvedmotor.Fig. 2 is an clcvationo'l' the: front side of the port- Fig. 3 is o rearview of the motor; partly in section. F g. 4 is a top View of the some;Fig. 5, a rear elevation of the port-plate broken away centrally. Figs,6, 7, 8, and 9 are sections upon plane or lines :2: 1.1:, Fig. i. i0 isa. transverse section on plane of line l0 10, Fig. 7.

Fig" ll is an clevstirni oi inner side oi one he pneumuti s. iiviouguponsn p i i. the valve rod connectious. l3 n elevation similar toFig. l, showinl each l'mciu-n-tic formed with on individual port-plate.l i of the lower or chest; Fig. 1. 15, Fig. 13. ing a. inodi'licutio' cione 01" the iii-o. position similar to Fig. "7.

hi my reference to the drawings forming a part of this application I usethe terms front, rear, top, 620., for convenience or description, itbeing understood that the motor a Whole may be arranged in any de siredposition or at any inclination to suit the requirements of use. I havealso herein shown and described the motor as composed of threepneumatics and connections, although any pluml numbenthereof may be usedin con notion. Furthermore, minor, details may be modified in form orstructure or mechanical expedieiits substituted with like result andwithout deperti from the spirit and intent f my invention in this re,spect.

It may be-sn-id that .J sis ot' my iniprovedstructure is the solidport-piste 1 Whether made individual to ouch pneumatic or common to theWhole number of pneo-- matics forming component parts of the n1otor, thesziid port plate or pistes being made Without chamber or opening surefor the inlet-ports 2'- and exhaust-ports c, as hereinafter set forth.Thus in Figs. 1 to 10, inclusive, the plate P is shown as suflicientlylarge in area to accommodate all three of the prion metics N andconstitute what may be c signoted as a, common port-plate for the some,whereas in Figs. 13 to 16, inclusive, the use of individual port-pletesis shownfthe result being practically the same in either ormngeinent,although both afford special advantages for special uses, since Whilethe common port-piste isthe simpler and stronger form the individualport-plate is better latented Nov. 13,1906.

adopted to climates and conditions that 1 would tend to Warp the Wood ofwhich both drawings, the solid common port-plate P is formed with eseries of inlctports i and a, se-

ries of exhaust-ports (2, one of each for every attain practically anarticulated joint-coup,-

bellows N used. A tension-chest T, secured to the rear of the port-plateP, incloses the exhaust-ports e on that side of the plate, saidtension-chest T being connected by a conduit or trunk t with air-exhaustmechanism of any desired character. The movable side of each pneumatic Nconsists, ordinarily, of a plain continuous board or plate a withoutopening of any kind, while the stationary side is essentially a frame nby which the pneumatic is attached to the port-plate P by screws .71 tothe frame n, inclosing a large area of the front side of the port-plateP, in which area is situated one of the exhaustport valves Eachexhaust-port valve E consists of a slide held between guideways e e, andthe inlet-valves I on the opposite side of the port-plate P are of likestructure and are held between guideways i i. The exhaust-port valve Eand the inlet-valve I for shown in the drawings, by threading the freeend of the connection rod D and providing it with'nu ts d d forengagement with a stud or shoulder e on the exhaust-valve, the wholepurpose of the adjustment being to regulate with accuracy the relativetiming of the valves, so that one shall close before the other opens,and vice versa, whereby the'al' ternate inflation and deflation of thepneumatic is assured without loss of power: The inlet-ports i are T-shaped, as will be seen by reference more particularly to Figs. 2 and5, the lateral extension i of the portslot i being madetoaffordelearance for the connection rod D. The pair of valves I E beingthus coupled together .by the rod D, necessarily travel simultaneouslyand are reciprocated by a crank 6'or other mechanical expedient on thedrivershaft S as an eccen tric, for instance, through the medium of avalve-rod V. In order to obviate as far as possible'all torsional orother strain in the connection between valves and crank-shaft, I employspecial means for couplin the valve-rods V to the inlet-valves I. T us atrunnioned coupling-block bis pivotally supported between lugs orstandards i i on the valve-slide I, the coupling-block b, beingperforated to receive the threaded end of the valve-rod V, which lattercarries nuts '11 c, which bear upon opposite sides of the coup-' lihgblock b and by their adjustment on the valve-rod time the valves I Ewith relation to their ports t e. It will be seen that I thus lingbetween the parts, since the trunnions of the coupling-block I) admit offree axial play while the freedom of the valve-rod to turn'on itslongitudinal axis, owin to the fact that it merely passes through t ecoupling-block and is not bound rigidly thereto by the nuts 1; c,prevents torsional, longitudinal, or lateral strain, which would resultin. undue or uneven pressure upon the inlet valve 1.

' The-flexing side not each pneumatic N is.

connected by a pitman M with a crank 5* upon the driver-s aft S, and apreferred construction is to connect both the pitman M and the valve-rodV to the same crank s, as shown in the drawings, althoughI do notrestrict myself to this construction, since sepa rate cranks or theirmechanical er uivalen'ts may obviously be piovided with li (e result, ifdesired. When pitman and. valve-rod are connected to the same crank 81,I prefer to .bi

furcateeither the valve-rod or. thefpitman fl so that both shall occupyand operate in the same plane. Thus in the drawmgs-the end of the pitmanis bifurcated to receive the-end of the valve-rod.

It will be seen that the foregoing description applies to the neumaticswhether applied to a common so id ort-plate or to individualport-plates, as in t e last four figures of the drawings, the onlypractical difference in the. latter case, aside from the fact that thecommon )ort-plate is a simply subdivided being that t e back or bottomplate t of the ten rod 'sion-chamber T is made continuous for its wholelength and is formed with exit-ports t connecting with the ports e inthe several port-plates P,'as will be understood bv reference to Fig,16. In this case each solid .portplate P constitutes practically thestationarv member of the pneumatic, and, if preferred, it may beactually made so, the bellowsleather being attached directly to its edes and a manhole n closed by a plate a, being provided to give access tothe interior for the adjustment of the exhaust-valve E, &c. i

It is to be understood that the'crankss of the shaft S break joints orproject at differ ent angles to obviate a dead-center, the relativeangles depending upon the number of pneumatics used, as heretofore. l

B the use of my solid plain.p0rt-plat e with no chambers or openingssave the inlet and exhaust orts I attain a com ctjr'igid structure, wile, dispensing with chambers or other direct means of comniuni cationbetw en the pneumatic and th'? 41tmosphere on orie side and between thematic and the tension-chest on the other. In this connection attentionmay be called to the great economy in space attained by my compactstructure of motor, owing mainly to the use of the comparatively thinflat port-plato and the location of the exhaustvalve within thepneumatic. Takenin connection with mechanical piano-players particularlythis reduction of the'area required to accommodate the motor is ofimportancelroln both commercial and artistic point of view.

The simplicity of my structure is an importent l'actor both from acommercial and practi point of view, since. the cost of mamilaeturingthe motor is reduced, while its clliciency is increased, as has beendemonstrated by practical t st and experiment. .l urthermore, afterbeing )ut together and properly timed it requires little or no attentionin the way of subsequent adjustment or repair, although it is soconstructed that access may be quickly and conveniently had to any part,it necessary.

am aware that in the structure shown in Patent No. 692,194, datedJanuary 28, 1902, o C. J. Davis, on which my invention is'animprovement, a series of pueumatics are ar-. anged to actuate adriver-shaft which in turn operates inlet and exhaust valves; but inthat case each pneumatic is inflated and deflated indirectly throughsingle port con nected with a valve-chest from which the air hasalternately o be exhausted and admitted, so that '-hc operation of thepneumatic is thus rcudcred unnecessarily slow, since the pnetunatic musthave time to respond to the change ol tension in the valve-chest,whereas in my construction I designedly dispense with a valve-chest andcontrol the tension in the pneumatic through separate inlet and exhaustports opening di ectly intothe pneumatic, so that the change of tensiontherein practically instautsmeous, and consequently more efl'cctive.Furthermore, there are other practical distinctions of structure hereindescribed andclaimed specifically which distinguish. my invention fromthe prior state of the act.

hat I claim as my invention, and desire to secure by Letters Patent, is

1. In an air tension-motor the combination, with a pneumatic, of a solidport-plate formed with inlet and. erhaust ports, a valve for theexhaust-port situated within the pneumatic and a valve for theinlet-port situated externally thereto, the two valves beingcoupledtogether by a connection passing through a slot in theport-plate, and being operated through suitable connections by v crankon a driver-shalt connected with the pneumatic, said driver shaft, and atensionchest communicating directly with the said exhaust-port.

2. In an air tension-motor. the combina tion with a pneumatic, of asolid port-plate formed with inlet and exhaust ports, a valve for theexhaust-port situated within the pneumatic and a valve forthe inlet-portsituated externally thereto, the two valves being coupled together by aconnection assing through a slot in the portplate,'an being operatedthrough suitable connections by a crank on a driver-shaft connected withthe pneumatic, means for adjusting the two said valves with relation toeach other, said driver-shaft, and a tension-chest communicatingdirectly with the said' eXhaustport.

3. In an air tension-motor, a solid portplate formed with inlet andexhaust ports, a pneumatic thestationary side of which consists of aframe for attachment to the said solid port-plate, a valve for theexhaust-port situated within the pneumatic and within the area inclosedby its said side frame, a valve for the inlet-port situated externallyto said pneumatic, the two said valves being coupled together by aconnection passing through a slot in the port-plate and being operatedthrough suitable connections by a crank on a driver-shaft connected withthe pneumatic, said driver-shaft, and a tension-chest communicatingdirectly with the said exhaustport. I

4. In an air tension-motor, the combination of a with inlet andexhaustports, a valve for the exhaust-port situated within the pneumatic, and avalve for the inlet-port situated externally thereto, the two valvesbeing coupled. together by a connection assing through a slot in theport-plate, an being connected by means of an articulated coupling andvalve-rod with a crank on a driver-shaftcom nected with the pneumatic,said driverrshalt,

pneumatic, a solid port-plate formed and a tension-chest communicatingdirectly withthe said exhaust-port.

5. In an air tension-motor, a-solid port' plate formed with inlet andexhaust ports, a. pneumatic attached to one side of said portplate, avalve for the exhaust-port situated in. said pneumatic, a manhole andcover on the movable side of said pneumatic for the purpose of givingaccess to said eXhaustvalve and connections, a valve for the inletportsituated externally to said pneumatic,

the said two valves being coupled together by a connection passingthrong a slot in the port-plate and'being operated through suitableconnections by a crank on a driver-shaft connected with the pneumatic,said drivershaft, and a tension-chest communicating directly with thee;{haust-'p0rt.

6.- In an air .tension-motor, the combination with a pneumatic, of asolid port-plate formed with inlet and exhaust ports, a valve fortne-cxhausteoort situated within the pneumatic, a valve for the inletport situated externally to said "meumatic, the said two nth us beingcoupled together by connecq a pneumatic, together with valves forcontrolport.

tion Ipassing through a slot in the port-plate and eing connected by avalve-rod with a 'crank' on a driver-shaft, said crank being alsoconnected by'a pitman with the pneu 'matic, said drivershaft, and atension-chest communicating lirectly with the exhaust- I said valvesbeing disposed within each pneumatic, and'means for operating saidvalves8. In an air tension-motor, the combinaplate common to all of saidpneumatics and tion of a plurality of p'neumatics, a solid porthavingseparate inlet and outlet ports for each pneumatic and directlyconnected therewith, valves controllin said orts one of said valvesbeing disposed Wit in each'pneumatic, means for operating said valves,and

a pled together by a connection a tension-chest mounted onsaidport-plate and into Whit h theexhaust-ports in the said port-plate opendirect;

n a pm umatic motor, the combination with a plurality of neumatics, of asolid. orb-plate com mon, to all the pneumatics and ormed with in lotand exhaust ports for each the 'xhaustwalves being situng said EOIts tin the Pneumatics and the inletated wit valves being situated externallythereto, each pair of inlet and exhaust valves being cou- (passingthrough aslot in the 'port-plate, an being operated through suitableconnections by "cranks on a driver-shaft, and a tension-chest ports.

communicating directly with the exhaust- 10. In an air tension-motor,the combina- *tion' of a plurality of 1pneumatics, a solid portf latecommon to al of the pneumatics and separate inletand outlet ports foreach pneumatic and dlrectly connected there with, valves controllingsaid ports one of said-valves being disposed withm each pneumatic, meansfor operating said valves, and a tension-chest mounted on saidport-plate and into which and the pneumatics said ex- I haust or outletdirect. I v

11. In an air tension-motor, the combinaports in said port-plate opention With a plurality of neumatics, of a ten-' directly thereinto, andvalves connected to move in unison, one Within the pneumatic and theother external thereto, for controlling said ports.

13. In an air tension-motor, the combination of a plurality ofneumatics, each communicating with a lurality of ports leadingthereinto, a Wind-c rest, and valves controlling said ports, connected.to move in unison, one of said valves being disposed between its portand the movable art of the pneumatic and outside the Wind-c est. I

14. In an air tension-motor, the combination of a plurality ofpneumatics, each communicating with a lurality of ports leadingthercinto, a Wind-c est, and valves connected to move in unison forcontrolling said ports, one of said ports being disposed between thewind-chest and the valve Whichcontrols it, and one of the said alvesdisposed Within the pneumatic and the other outside thereof,

- GEORGE P. BRAND. Witnesses:

D. W. GARDNER, GEO. WM. MIATT.

'municating with a plurality of ports leading

